void main(List<String> args) {
  int firstFlutterCode = 12;
  var a = 12;
  const b = 'wosh';
  //const ab = 12 / a; //这种方式不对，不可以这样
  final c = 12 / 3;
  final ac = 12 / a; //可以通过计算实现赋值
  print(firstFlutterCode);
  print(a);
  print(b);
  print(c);
  print(identical(a, b)); //判断两个变量是否相同
}

class Person {
  final String name;
  const Person(this.name);
}
